Ouranoupoli is an ancient city and a modern village in Chalcidice. It was founded by Cassander and his brother Alexarchus in the late 4th century BC. The village is today called Ouranoupoli.
The village of Ouranoupoli is situated on the coastline in the northwest part (the very beginning) of the Athos peninsula, part of the bigger Chalkidiki peninsula. It is the last settlement before the border with the monks republic of Mount Athos (the Holy Mountain).